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Class 7 Maths Worksheet: Fractions and Decimals

Maths worksheets lesson 50: Fractions and decimals: multiply and divide · Set 56 · 40 sums
TalentJR

The method (Flip and multiply): a/b × c/d = (a × c)/(b × d), then simplify. A whole number n is n/1. a/b ÷ c/d = a/b × d/c. Decimal × decimal: multiply as whole numbers; the answer has as many decimal places as both numbers together — 1.2 × 0.3 = 0.36. Decimal ÷ decimal: multiply both by 10 (or 100) first — 2.4 ÷ 0.6 = 24 ÷ 6 = 4.

NameDateTime takenScore ___ / 40
  1. 1.One bag of potatoes weighs 5.6 kg. How many kg do 10 of them make in all? =
  2. 2.3/7 × 14 =
  3. 3.7/9 × 7 =
  4. 4.One jug of milk holds 8.5 L. How many L do 6 of them make in all? =
  5. 5.7/9 × 4 =
  6. 6.5/8 × 4 =
  7. 7.One bag of potatoes weighs 6.2 kg. How many kg do 2 of them make in all? =
  8. 8.7/9 ÷ 8/9 =
  9. 9.22.12 ÷ 4 =
  10. 10.3/7 ÷ 2/3 =
  11. 11.17.8 ÷ 5 =
  12. 12.33.92 ÷ 8 =
  13. 13.One bag of potatoes weighs 7.8 kg. How many kg do 9 of them make in all? =
  14. 14.1/6 × 4/5 =
  15. 15.1.8 ÷ 0.2 =
  16. 16.1.8 ÷ 0.3 =
  17. 17.2.7 × 0.2 =
  18. 18.2/7 ÷ 5/8 =
  19. 19.2.1 ÷ 0.7 =
  20. 20.2/5 × 3 =
  21. 21.5/6 ÷ 5/8 =
  22. 22.9.74 ÷ 2 =
  23. 23.4/7 × 7/9 =
  24. 24.One roll of ribbon has 1.3 m. How many m do 3 of them make in all? =
  25. 25.8/9 ÷ 1/8 =
  26. 26.6.76 ÷ 2 =
  27. 27.One jug of milk holds 5.1 L. How many L do 10 of them make in all? =
  28. 28.7/8 × 6 =
  29. 29.3.5 × 0.7 =
  30. 30.1/4 × 4/5 =
  31. 31.2/3 × 7/8 =
  32. 32.1.9 × 0.8 =
  33. 33.5/8 ÷ 3/4 =
  34. 34.One roll of ribbon has 5.4 m. How many m do 6 of them make in all? =
  35. 35.1/5 ÷ 3/4 =
  36. 36.4.9 ÷ 0.7 =
  37. 37.1/9 × 3/4 =
  38. 38.2/9 ÷ 3/5 =
  39. 39.2/3 ÷ 2/7 =
  40. 40.2/7 × 9 =

Answer key

  1. 56
  2. 6
  3. 49/9
  4. 51
  5. 28/9
  6. 5/2
  7. 12.4
  8. 7/8
  9. 5.53
  10. 9/14
  11. 3.56
  12. 4.24
  13. 70.2
  14. 2/15
  15. 9
  16. 6
  17. 0.54
  18. 16/35
  19. 3
  20. 6/5
  21. 4/3
  22. 4.87
  23. 4/9
  24. 3.9
  25. 64/9
  26. 3.38
  27. 51
  28. 21/4
  29. 2.45
  30. 1/5
  31. 7/12
  32. 1.52
  33. 5/6
  34. 32.4
  35. 4/15
  36. 7
  37. 1/12
  38. 10/27
  39. 7/3
  40. 18/7

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